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memcg, slab: merge memcg_{bind,release}_pages to memcg_{un}charge_slab

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Currently we have two pairs of kmemcg-related functions that are called on
slab alloc/free.  The first is memcg_{bind,release}_pages that count the
total number of pages allocated on a kmem cache.  The second is
memcg_{un}charge_slab that {un}charge slab pages to kmemcg resource
counter.  Let's just merge them to keep the code clean.

Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Glauber Costa <glommer@gmail.com>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vladimir Davydov
2014-06-04 16:07:39 -07:00
committed by Linus Torvalds
parent 1e32e77f95
commit c67a8a685a
5 changed files with 24 additions and 31 deletions
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22
mm/memcontrol.c
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@@ -2954,7 +2954,7 @@ static int mem_cgroup_slabinfo_read(struct seq_file *m, void *v)
}
#endif
int memcg_charge_kmem(struct mem_cgroup *memcg, gfp_t gfp, u64 size)
static int memcg_charge_kmem(struct mem_cgroup *memcg, gfp_t gfp, u64 size)
{
struct res_counter *fail_res;
int ret = 0;
@@ -2992,7 +2992,7 @@ int memcg_charge_kmem(struct mem_cgroup *memcg, gfp_t gfp, u64 size)
return ret;
}
void memcg_uncharge_kmem(struct mem_cgroup *memcg, u64 size)
static void memcg_uncharge_kmem(struct mem_cgroup *memcg, u64 size)
{
res_counter_uncharge(&memcg->res, size);
if (do_swap_account)
@@ -3390,6 +3390,24 @@ static void memcg_create_cache_enqueue(struct mem_cgroup *memcg,
__memcg_create_cache_enqueue(memcg, cachep);
memcg_resume_kmem_account();
}
int __memcg_charge_slab(struct kmem_cache *cachep, gfp_t gfp, int order)
{
int res;
res = memcg_charge_kmem(cachep->memcg_params->memcg, gfp,
PAGE_SIZE << order);
if (!res)
atomic_add(1 << order, &cachep->memcg_params->nr_pages);
return res;
}
void __memcg_uncharge_slab(struct kmem_cache *cachep, int order)
{
memcg_uncharge_kmem(cachep->memcg_params->memcg, PAGE_SIZE << order);
atomic_sub(1 << order, &cachep->memcg_params->nr_pages);
}
/*
* Return the kmem_cache we're supposed to use for a slab allocation.
* We try to use the current memcg's version of the cache.